Creates pod with Langflow and Postgres

bin/create_pod_langflow.sh

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+#!/bin/bash
+
+# To be run by user ncd to create pod and Langflow + Postgres containers
+
+set -e
+
+# Environment variables
+POD_NAME='langflow_pod'
+LANGFLOW_CTR_NAME='langflow_ctr'
+LANGFLOW_IMAGE='docker.io/langflowai/langflow:v1.6.9'
+POSTGRES_CTR_NAME='postgres'
+POSTGRES_IMAGE='docker.io/library/postgres:18.1'
+HOST_LOCAL_IP='127.0.0.1'
+# Expose Langflow on 8090 -> 7860; Postgres is only reachable inside the pod
+LANGFLOW_HOST_PORT='8090'
+LANGFLOW_CONTAINER_PORT='7860'
+BIND_DIR="$HOME/.local/share/$POD_NAME"
+LANGFLOW_DATA_DIR="$BIND_DIR/langflow-data"
+POSTGRES_DATA_DIR="$BIND_DIR/postgres-data"
+USER_SYSTEMD_DIR="$HOME/.config/systemd/user"
+
+# Prepare directories
+mkdir -p "$LANGFLOW_DATA_DIR" "$POSTGRES_DATA_DIR" "$USER_SYSTEMD_DIR"
+
+# Create pod if not yet existing
+if ! podman pod exists "$POD_NAME"; then
+  podman pod create -n "$POD_NAME" \
+    -p "$HOST_LOCAL_IP:$LANGFLOW_HOST_PORT:$LANGFLOW_CONTAINER_PORT"
+  echo "Pod '$POD_NAME' created (rc=$?)"
+else
+  echo "Pod '$POD_NAME' already exists."
+fi
+
+# Remove any old containers
+podman rm -f "$LANGFLOW_CTR_NAME"
+podman rm -f "$POSTGRES_CTR_NAME"
+
+# Postgres container
+podman run -d --name "$POSTGRES_CTR_NAME" --pod "$POD_NAME" \
+  -e POSTGRES_USER=langflow \
+  -e POSTGRES_PASSWORD=langflow \
+  -e POSTGRES_DB=langflow \
+  -v "$POSTGRES_DATA_DIR:/var/lib/postgresql/data:Z" \
+  "$POSTGRES_IMAGE"
+echo "Container '$POSTGRES_CTR_NAME' started (rc=$?)"
+
+# Langflow container
+podman run -d --name "$LANGFLOW_CTR_NAME" --pod "$POD_NAME" \
+  -e LANGFLOW_DATABASE_URL=postgresql://langflow:langflow@postgres:5432/langflow \
+  -e LANGFLOW_CONFIG_DIR=/app/langflow \
+  -v "$LANGFLOW_DATA_DIR:/app/langflow:Z" \
+  "$LANGFLOW_IMAGE"
+echo "Container '$LANGFLOW_CTR_NAME' started (rc=$?)"
+
+# Generate systemd service files
+cd "$USER_SYSTEMD_DIR"
+podman generate systemd --name --new --files "$POD_NAME"
+echo "Generated systemd service files (rc=$?)"
+
+# Stop & remove live pod and containers
+podman pod stop --ignore --time 15 "$POD_NAME"
+podman pod rm -f --ignore "$POD_NAME"
+if podman pod exists "$POD_NAME"; then
+  echo "ERROR: Pod $POD_NAME still exists." >&2
+  exit 1
+else
+  echo "Stopped & removed live pod $POD_NAME and containers."
+fi
+
+# Enable systemd user services
+systemctl --user daemon-reload
+# pod service (creates pod + containers)
+systemctl --user enable --now "pod-${POD_NAME}.service"
+systemctl --user is-enabled "pod-${POD_NAME}.service"
+systemctl --user is-active "pod-${POD_NAME}.service"
+echo "Enabled systemd service pod-${POD_NAME}.service (rc=$?)"
+echo "To view status: systemctl --user status pod-${POD_NAME}.service"
+echo "To view logs: journalctl --user -u pod-${POD_NAME}.service -f"
+
+# Wait for API readiness
+CHECK_URL="http://$HOST_LOCAL_IP:$LANGFLOW_HOST_PORT"
+for attempt in $(seq 1 30); do
+  if curl -fsS "$CHECK_URL" >/dev/null 2>&1; then
+    echo "Langflow REST API is reachable at http://$HOST_LOCAL_IP:$LANGFLOW_HOST_PORT."
+    break
+  fi
+  sleep 2
+  if [ "$attempt" -eq 30 ]; then
+    echo "timeout error." >&2
+    exit 1
+  fi
+  done